Joint



0a. 8,1935, E E HALL v 2,016,858

JOINT Filed Sept. 22, 1932 45 a Ja .Eflw

' UNITED Iii-lo E. Hall,

STATES PATENT OFFICE JOINT Chicago; 111., asslgnor'ot one-half to H. Jacobson, Chicago, Ill.

Application September 22, 1932, Serial No. 634,345

. 11 Claims.

My invention is concerned with joints, intended primarily for concrete road construction,

andis designed to constructed joint that will ing conditions the road from tion otcracks.

produce a simple and cheaply take care of the varyexisting in road work and preserve disintegration due to the forma- To this end, it consists-in a novel construction and method which is hereinafter fully described and claimed.

To illustrate my invention, I annex hereto a sheet of drawing in which characters are used in all the figures,

invention before Fig. 2 is a transverse slightly modified form, been poured and the the same reference to designate identical parts or which,- Fig. 1 is a perspective view of one the concrete is poured;

section illustrating a after the concrete has joint completed; and

form of my Fig. 3 is a perspective view of a clip which I may employ in to take care of the of the concrete due my construction. It is well understood by road engineers that,

expansion and contraction to changes in the temperature, it is advisable to construct the ordinary eighteen-foot road with a joint extending all places into have a length are employed, or the that develop if they vention is designed longitudinal crack or along'the center, dividing it at slabs nine feet wide, depending upon the distance between the transverse expansion which will joints, if such irregular transverse cracks are not employed. My into produce a joint that is eflicient in protecting the road, and which may be used for both the joints.

In carrying out essential element longitudinal and transverse my invention, I employ as an a sheet-metal strip it which is preferably substantially. an inverted T-shape in cross section, but with the vertical portion consisting of two thicknesses of a distance slightly greater than the thickness of the metal to separated by open at the bottom metal, preferably form a channel II in the form shown in Fig. 1.

The horizontal portions l2 are provided with apertures l3 therein of the proper size and shape to accommodate the positioning supports l4, whichare preferably metallic rods sharpened at their lower ends adapted to fit in and having the apertures l3, and to have a cross section the horizontal portions l2 secured thereto by the sheet-metal clips l5, adapted to have U-shaped in design, and the bottom fit into any desired one of the annular channels Hi formed in the supports it to receive them,

a plurality of channels being employed so that the strip l0 can be adjusted at any desired height from the base material I8, depending upon the thickness of the slab. The upturned ends ll of these clips l5 are adapted to be bent over the edges of the'por- I tions l2, as seen, so that when the supports it 5 are driven into the base material iii, the metallic joint member will be properly supported above it, as shown in Fig. 1, and held there securely when the concrete I9 is poured. It is unnecessary to place supports or stakes H in all of the apertures l3, and the concrete extending through these vacant apertures will necessarily bond the horizontal portions or flanges 12 to the slabs they penetrate, so that as the slabs contract the space between the vertical portions of the strip 15 10 increases, and diminishes as the slabs expand.

In addition to the T-shaped portion III, I preferably employ the corrugated extension 20, which may be formed integrally therewith, as illustrated in Fig. 1, being connected thereto by the turnedunder portion 2|, or which may be formed separately, as seen in Fig. 2, and welded or otherwise secured in the-bottom of the channel II. It preferably extends down to the base 'material l8, and serves to form a tongue-and-groove connection between the adjacent slabs of concrete, so that pressure on one near the joint is also taken by the other.

Preferably after the concrete is poured, and while-it is still soft, a groove 22 is scraped out down to a short distance below the top of the vertical portion of the metallic joint member III, which is preferably here reduced in thickness, as seen at 23, by having the metal brought together so as to end the channel I I at this height. This reduction in the thickness of the vertical portion makes its upper edge better adapted to receive and guide a tool which will be employed in scraping out the groove 22. Before the groove is scraped out, when it is a longitudinal center joint that is being constructed, I preferably run a narrow roller over the concrete, centering it over the joint 10, sothat a very shallow channel 24 is formed, in the center of which the groove 22 is located. When the concrete is set, this channel 24 and the groove 22 are filled with some mastic filler, which takes care of the expansion, and keeps the dirt out of the joint. After this filler deteriorates, as it will in time, it can be readily scraped out by the tool used to form the groove 22, and replaced with fresh material, and the mastic in the channel 24 (or paint, which might be sub- .stituted) forms the customary marker for the I longitudinal center joint.

With the structure shown, it will be obvious that a joint is formed that will take care of the normal expansion and contraction of the slabs, and one that compels any slab to take part of the load near by on the adjacent slab, without any relative movement of the slabs tending to destroy or weaken the joint. With the mastic filler kept in condition, no water can get into the joint to cause trouble, and even if the filler were missing, water cannot readily pass around the portions I I to reach the bottom of the joint and enter the base material It, where its presence would be detrimental.

While I have herein shown and described my invention as embodied in the form which I at present consider best adapted to carry out its purposes, it will be understood that it is capable of claims except as of the prior art.

What I claim as new, and desire to secure by Letters Patent 01 the United States, is:

1. In a pavement joint, the combination with a sheet-metal strip bent into a cross form in cross section with the upwardly extending portion formed of two layers of metal slightly separated and having the downwardly extending portion corrugated longitudinally, of supports adapted to extend through the horizontal side portions of the strip to the base material and to be finally embedded in the pavement material, and means for preventing the strip from being forced nearer to the base material when the concrete is being poured.

2. In a pavement joint, the combination of a member formed of a piece of resilient material bent upon itself to provide spaced walls movable relatively to each other at the bend, the material forming said walls being fashioned to provide an outwardly projecting extension at the lower edge of each of said walls, a support for said member, said support comprising a plate the upper termination thereof being located within the space provided between the spaced walls to each other, and means for preventing the plate from being forced nearer to the base material when the concrete is being poured, said means consisting of a plurality of supports adapted to extend through the said outwardly projecting extensions of said member and into the base material, said means to be finally embedded in the pavement material.

3. A Joint for concrete pavements and the like consisting of a strip of sheet metal of an inverted T-shape in cross section having apertures in the horizontal portions together with a strip of sheet metal substantially corrugated in cross section extending from the center of the first strip to the base material, and supporting pegs driven through some of the apertures into the base material and serving to position the joint while the concrete is being poured, and finally embedded therein.

4. In a pavement joint, the combination of a member formed of a piece of resilient material bent upon itself to provide spaced walls movable relatively to each other at the bend, the material forming said walls being fashioned to provide an outwardly projecting extension at the upper termination thereof being located within the space providing means assisting to hold said walls of said member in spaced relation to each other, and supporting members engaging the said outwardly projecting extensions and extending into the base material and serving to position the joint while the concrete is being poured, said supporting members to be finally embedded in the pavement material.

5. In a concrete pavement or the like, the combination with a pair of adjoining concrete slabs, of a sealing connection for the same compensating for the relative linear movement of' the slabs, said connection consisting of a thin metallic strip whose cross section forms a narrow vertical loop closed at the top with the sides of the loop only slightly separated and having a pair of perforated flanges at the bottom of the loop, each one extending into itsadjacent slab and secured thereto, supporting stakes embedded in the slabs and initially driven through the perforations of the flanges preventing possible overturning of the connection while the concrete is being placed, and means for preventing the connection from being forced nearer to the base material when the into the base material concrete is being placed, said last-mentioned means consisting of annular grooves in the stakes and U-shaped metal clips adapted to fit in the grooves of the stakes and have their ends bent over the edges of the flanges, for the purpose described.

- 6. In a pavement joint, the combination of a member formed of bent upon itself to relatively to each a piece of resilient material provide spaced walls movable other at the bend, the material forming said walls being fashioned to vide an outwardly projecting extension at the lower edge of each of said walls, and means for preventing the member from being forced nearer to the base material when the concrete is being poured, said means consisting of a. plurality of 40 stakes adapted to be afllxed to the said outwardly projecting extensions of said member and extend into the base material and to be finally embedded in the pavement material.

'7. In a concrete combination with a pair of adjoining concrete slabs, of a sealing connection for the same compensating for the relative linear movement of the slabs and consisting of a thin metallic strip,

pavement or the like, the

its cross section forming a narrow vertical loop closed at the top with the sides of the loop only slightly separated and having a pair of perforated fianges at the bottom of the loop, each one extending into its adjacent slab and secured thereto, and supporting means for said connection which prevents its possible movement while the concrete is being placed, the uppermost portion of the loop having its sides in actual contact and the central and lower portions of said loop having its sides slightly separated.

8. In a pavement formed of a piece of resilient material bent upon itself to provide a loop comprising a pair of spaced walls movable relatively to each other at the bend, the material fashioned to provide. an outwardly projecting extension at the lower edge ofeach of said walls, the uppermost portion of said loop having its walls in actual contact, the central, and lower joint, ,asealing member forming said walls being portions of said loop having theirwalls slightly 7:0

separated.

9. A device providing a seal for a space loedge thereof bent to provide a seal having a bent to provide spaced walls formed to provide single pair oi connected spaced walls, the inner a longitudinally extending recess therebetween, races of said walls being in actual contact with the inner faces oi said walls being in actual each other adjacent the point of connection, and contact with each other adjacent the point of a lateral flange extending from each wall, the connection, and a lateral flange extending Irom 5 latter providing means for bonding the seal with each wall, the material of one flange being bent said sections, and a member providing said supback upon said flange and being bent downport extending downwardly from one 01' said wardly to provide said support. flanges to the base material and being formed 11. A seal of the kind described comprised of to provide means preventing the relative vertia single piece of material having a portion pro- 10 cal movement or said sections. viding a support therefor, the upper edge of the 10. A device for sealing a space between adsupport being formed to provide the seal by jacent roadway sections compensating for the being bent laterally and thence inwardly and relative linear movement 0! said sections and upwardly and thence downwardly and laterally providing a support from thebase material for and thus establishing parallel walls with a lon- 15 said sealing means, said device being formed gitudinal recess therebetween. of a single strip of metal one edge of which is ERIC E. HALL. 

